Capacitive electrical discharge scribing for improving core loss

Details Capacitive electrical discharge scribing for improving core loss Capacitive electrical discharge scribing for improving core loss

1987-05-08

1988-10-25

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148113, 21912135, H01F 104

Patent

active

047801557

ABSTRACT:
A method and apparatus are provided for domain refinement of texture annealed and insulation coated grain-oriented silicon steel strip by contacting the insulated steel surface to be scribed with a discharge electrode, moving the electrode substantially transverse to the rolling directioln while essentially maintaining contact, and marking the steel with a plurality of electrical discharge craters generally aligned across the steel by producing a plurality of electrical discharges between the electrode and steel from a capacitor of 0.001-10.0 microfarads.

REFERENCES:
patent: 3990923 (1976-11-01), Takashina et al.
patent: 4652316 (1987-04-01), Beckley
"Further Prospects for Grain-Oriented Silicon Steels," J. A. Salsgiver, Journal of Metals, vol. 38, No. 1, Jan. 1986, pp. 27-31.

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